Pore-free tire segmental mould and pattern block thereof

Abstract

The invention provides a pore-free tire segmental mould and a pattern block thereof. The pattern block comprises a plurality of pattern pieces and a pattern piece shell, wherein the pattern pieces are circumferentially arranged and assembled to form an annular structure capable of accommodating a rubber blank for tire molding, and the pattern piece shell sleeves the outer side of the annular structure; exhaust ducts are arranged inside the annular structure and are communicated with the inner side and the outer side of the annular structure, and each exhaust duct comprises an exhaust gap which is positioned between every two adjacent pattern pieces, is arranged along the axial direction of the annular structure, and is capable of preventing the rubber blank from overflowing the annular structure; the exhaust gap is close to the inner side of the annular structure. The mould provided by the invention comprises the pattern block. The pore-free tire segmental mould and the pattern block thereof provided by the invention have a good exhaust performance, and the effects of only exhausting and no rubber leaking are achieved, so that the tread of the finally molded tire has no rubber hair, the appearance quality of the tire is ensured, the unnecessary waste of a rubber material is avoided, and the production cost is ensured.

Description

technical field [0001] The invention relates to a tire mold, in particular to a non-porous tire flexible mold and pattern blocks thereof. Background technique [0002] In the existing tire vulcanization process, in order to release the air in the mold cavity so that the rubber can be evenly distributed in the mold, the existing tire molds are all provided with a plurality of vent holes on the mold cavity. Drilling is usually used to form the required vent holes. Since the burrs at the end of the holes need to be trimmed after the drilling process is completed, the mold manufacturing process is increased and the mold manufacturing cost is increased. In addition, during the vulcanization process, since the exhaust in the tread area is discharged through circular air holes, these air holes are usually located on the top surface of the inner tube of the mold and penetrate to the outer surface of the mold. The vulcanized raw rubber will be squeezed out of the top cavity of the m...

AI Technical Summary

Problems solved by technology

Drilling is usually used to form the required vent holes. Since the burrs at the end of the holes need to be trimmed after the drilling process is completed, the mold manufacturing process is increased and the mold manufacturing cost is increased.

In addition, during the vulcanization process, since the exhaust in the tread area is discharged through circular air holes, these air holes are usually located on the top surface of the inner tube of the mold and penetrate to the outer surface of the mold. The vulcanized raw rubber will be squeezed out of the top cavity of the mold; when the air is exhausted from the mold, the rubber will be squeezed into the drilled vent holes to form hairs, and some of these hairs may be broken at the mold vents It will hinder the discharge of air in the cavity, which will cause the rubber to not completely fill the entire mold cavity. In order to avoid this situation, it is necessary to remove the tire mold from the production line for cleaning. The general cleaning operation is to use a drill to drill each The rubber in the pores is drilled out, which is very time-consuming and affects the production efficiency; at the same time, most of the rubber hairs stand on the tires after demoulding. In order to remove the rubber hairs, special personnel and corresponding equipment have to be set up for trimming. Affects the appearance quality of the tire, and wastes the rubber material, increasing the production cost

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